Lifting jack



June 12, 1923.

D. F. HILTON LIFTING JACK Filed Dec. 12 1919 [are mar Patented June 12, 1923.

PATENT OFFICE.

DAVID F. HILTON, OF DENNISON, OHIO.

LIFTIN'G JACK.

Application filed December 12, 1919. Serial No. 344,491.

T 0 all whom it may concern:

Be it known that DAVID I. HILTON, a citizen of the United States, residing at Dennison, in the county of Tuscarawas and State of Ohio, has invented certain new and useful Improvements in Lifting Jacks, of which the following is a specification.

This invention relates to lifting jacks and the primary object is to provide an im proved structure for effectively lifting any object under which the jack is placed.

One of the objects of the invention is to provide a structure having cooperating levers arranged to accomplish the raising and locking operation of the jack so that the locking may be accomplished automatically when the jack is operated to be raised or lowered.

Another object is to provide a lifting jack which will be simple in construction,

durable, and well adapted to withstand the rough usage to which devices of this character are ordinarily subjected.

In the drawings Fig. 1 is a side elevation.

Fig. 2 is an edge elevation.

Referring to the drawings, the base 1 is provided with an upright 2 which consists of laterally spaced standards 3, having their lower ends lined by flanges 4 to the base. Each standard is provided with an opening 5, the opposite edges of the openings are provided with lugs as shown at 6. These lugs are grooved on their upper and lower faces to receive the pin of the lever as hereinafter described. The outer edge of each standard is provided with a series of recesses as at 7, having their lower portion beveled.

A lifting lever 8 is provided with a transverse pin 9 adapted to be received in the grooved portion of the lugs 6 as shown in Fig. 1. This provides a fulcrum for the lifting lever so that the portion 10 of the lever may be employed to elevate the vehicle or body. The opposite end of the lever is provided with a handle 11, having a slot 12 therein. Extending transversely through the slot 12 in the lever is a pivot pin 18, which has secured thereto a link 14:. This link receives the hooked end 15 of a latch 16 which has its free end provided with a T shaped head 17, which is adapted to be received into the recesses 7. The pin 13 acts as a pivot for the latch liftinglever 18 which comprises the arm 19 and the handle 20, the latter being normally disposed above the handle 11.

When the device is in use a downward pressure on the handle 11' of the lever 8 will cause the opposite end 10 to elevate the body while the latch member will drop to permit the head 17. to register with one of the recesses 7,thereby maintaining the lever 8 in locked position. The latch is released by pressing on the member 20 thus causing the arm 19 to move the latch head 17. out of the locked position whereby the lifting lever will swing to its lowermost position permitting the body to drop. The beveled portion of the recesses 7 permit the head 17 to readily release itself as it is brought in operation with the latch release. The upper grooved portion of the lugs supports the lever pin 9 in operating the device and it also tends to retain this pin from misplacement, thereby assisting in holding the lever securely in the desired locked position until released by the operator. The lower grooved portion prevents the pin from moving too high when adjusting the lever and at the same time'it holds the pin in a position directly over the groove below it that when presseddown to make the lift the pin will readily move into the required groove of the lug immediately beneath.

I claim:

A lifting jack comprising an upright, a lifting lever adapted to fulcrum thereon, a pivot member on said lever, a link fastened to the lever by said pivot member, a leverfastening latch pivoted to said member and engageable with the upright, a lifting lever for the latch pivoted on said member d movable relatively to the link, the

upper end portion of the latch-lifting lever extending above the operating end of the first lever to facilitate manipulation, and

the other end portion of the latch-lifting lever being adapted to directly engage said latch to unfasten it, and the latter end portion being normally disengaged from said latch,

In testimony whereof I aflix my signature.

DAVID F. HILTON. 

